CN102430533B - Engineering machinery and water washing system thereof - Google Patents
Engineering machinery and water washing system thereof Download PDFInfo
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- CN102430533B CN102430533B CN201110262386.XA CN201110262386A CN102430533B CN 102430533 B CN102430533 B CN 102430533B CN 201110262386 A CN201110262386 A CN 201110262386A CN 102430533 B CN102430533 B CN 102430533B
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Abstract
The invention discloses engineering machinery and a water washing system thereof. The water washing system of the engineering system comprises a water circulation component and a pneumatic emptying component, wherein the water circulation component comprises a water pump driving device, a water pump and a water pipe; the water pump driving device drives the water pump to rotate; the water pipe is connected with the water pump; the pneumatic emptying component comprises a pneumatic pipe; one end of the pneumatic pipe is communicated with an air source, and the other end is communicated with the water circulation component; the water washing system also comprises a first processor and a detection device; the pneumatic pipe is connected in series with an air path control valve; the detection device is used for detecting the operation state of the water circulation component; and when the first processor judges that the water circulation component stops operation according to a detection signal of the detection device, the first processor can open the air path control valve. By adopting the water washing system, the pneumatic emptying component can discharge water held in the circulation component in time after the water washing is finished.
Description
Technical field
The present invention relates to a kind of water-washing technique of engineering machinery, particularly a kind of water wash system of engineering machinery, also relates to the engineering machinery that comprises this water wash system.
Background technology
Current, conventionally utilize water wash system to clean the engineering machinery such as concrete mixer, conveying machinery, to avoid the materials such as concrete bonding, keep the effective utilization of engineering machinery.Water wash system generally comprises water circulation assembly, and water circulation assembly comprises the water pump drive unit of water tank, water pump, driving pump operation and suitable water pipe; The water that water pump can be pumped by suitable water pipe is introduced the precalculated position of engineering machinery, and precalculated position and material thereof are rinsed.
Under the lower working environment of the temperature such as cold or winter, in order to prevent that the water in water circulation assembly from freezing and causing water pump or water pipe to damage, and need to, after water-washing process finishes, discharge the water in water circulation assembly.
For the water in water circulation assembly is discharged, water wash system can arrange the emptying assembly of corresponding air pressure.The emptying assembly of air pressure generally comprises pneumatic tube, and described pneumatic tube one end communicates with source of the gas, and the other end communicates with water pipe or other parts in water circulation assembly by check valve.The emptying assembly of air pressure can be pressed into air in water circulation assembly by check valve, and the water being detained in water circulation assembly is forced to discharge; Check valve can stop the aqueous reflux in water circulation assembly to enter in pneumatic tube.Current, although the emptying assembly of air pressure can be discharged the water in water circulation assembly, all need to carry out independent manual operation, the operational motion that depends on operating personnel starts; Therefore, in actual job, often do not start the emptying assembly of air pressure due to operating personnel's negligence or artificial origin, and then can not in time the water in water circulation assembly be discharged, cause the damage to water circulation assembly and water wash system.
Therefore, how in time the water in water circulation assembly to be discharged in time, and then to avoid because water freezes the damage of water circulation assembly be those skilled in the art's technical issues that need to address.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is, a kind of water wash system of engineering machinery is provided, and utilizes this water wash system, and after washing finishes, the emptying assembly of its air pressure can be discharged the water in water wash system in time in time.
Under the prerequisite that above-mentioned water wash system is provided, the present invention also provides a kind of engineering machinery that comprises this water wash system.
For solving the problems of the technologies described above, the water wash system of engineering machinery provided by the invention comprises the empty assembly of the gentle pressure of water circulation assembly; Described water circulation assembly comprises water pump drive unit, water pump and water pipe; Described water pump drive unit drives described pump operation, and described water pipe is connected with water pump; The emptying assembly of described air pressure comprises pneumatic tube, and one end of described pneumatic tube communicates with source of the gas, and the other end communicates with water circulation assembly; Also comprise first processor and checkout gear; On described pneumatic tube, be connected with gas path control valve; Described checkout gear is for detection of the operating condition of described water circulation assembly; In the time that described first processor judges that according to the detection signal of checkout gear water circulation assembly shuts down, this first processor can make described gas path control valve open.
Optionally, described water circulation assembly comprises the water inlet control valve that is connected in pump sump mouth; Described checkout gear is the state detection sensor that detects described water inlet control valve state.
Optionally, described water circulation assembly also comprises the water pump controlling organization of controlling described water pump drive unit and the second processor of controlling this water pump controlling organization; Described checkout gear is the detecting unit that detects the second processor control signal.
Optionally, described first processor, the second processor and detecting unit are integrated into a controller.
Optionally, also comprise the water inlet control valve that is connected in pump sump mouth; In the time that described first processor judges that described water circulation assembly shuts down, also make described water inlet control valve close.
Optionally, described water pipe comprises water inlet pipe, and described water inlet pipe is connected between water inlet control valve and the water sucking mouth of water pump; The other end of described pneumatic tube communicates with described water inlet pipe.
Optionally, also comprise the outlet water control valve being connected with the described water pump pump mouth of a river; The scheduled time after described first processor is opened gas path control valve, this first processor can also make outlet water control valve close, and makes described water inlet control valve open simultaneously.
Optionally, also comprise the temperature detection sensor that water temperature to water tank or environment temperature detect; In the time that described first processor judges the water temperature of water tank or environment temperature lower than predetermined value according to the detection signal of temperature detection sensor, then judge according to the detection signal of checkout gear whether water circulation assembly shuts down.
Optionally, also comprise the forced drainage switch being connected with described first processor; At described forced drainage switch, during in predetermined state, described first processor judges according to the detection signal of checkout gear whether water circulation assembly shuts down.
Optionally, also comprise level detection sensor and the warning device for detection of the water level in the precalculated position of described water circulation assembly; Described first processor can send alarm signal to warning device according to predetermined control strategy; Described warning device can send predetermined warning according to alarm signal; Described predetermined control strategy comprises: the scheduled time after described gas path control valve is opened, and the water level in described water circulation assembly precalculated position is during higher than predetermined value, and described first processor sends alarm signal to warning device.
Engineering machinery provided by the invention comprises engineering machinery body and water wash system, and described water wash system is above-mentioned any water wash system, and the pump mouth of a river of described water pump communicates with the precalculated position of engineering machinery body by water pipe.
Compared with prior art, the water wash system of engineering machinery provided by the invention comprises first processor and checkout gear; And be connected with gas path control valve on described pneumatic tube; Described checkout gear is for detection of the operating condition of described water circulation assembly; According to the detection signal of checkout gear, in the time that described first processor judges that water circulation assembly shuts down, this first processor can make gas path control valve open.Like this, shut down at water circulation assembly, when water-washing process finishes, first processor can be opened gas path control valve automatically, makes compressed air pass through the emptying assembly of air pressure and arrives in water circulation assembly, and the water of water circulation assembly is forced to discharge; And then, utilize this water wash system, after washing finishes, the emptying assembly of its air pressure can be discharged the water being trapped in recirculation assembly in time in time.
In further technical scheme, described water circulation assembly comprises the water inlet control valve that is connected in pump sump mouth; Described checkout gear is the state detection sensor that detects described water inlet control valve state.Like this, in the time water-washing process being finished and water inlet control valve is closed, just can automatically start the emptying assembly of air pressure, the water in water circulation assembly is discharged in time.
In further technical scheme, described water circulation assembly also comprises the water pump controlling organization of controlling described water pump drive unit and the second processor of controlling this water pump controlling organization; Described checkout gear is the detecting unit that detects the second processor control signal.Can judge the operating condition of water circulation by detecting the second processor control signal, can improve so on the one hand the reliability of the detection signal of checkout gear, can improve on the other hand the automaticity that in water wash system, the emptying assembly of air pressure starts.
In further technical scheme, described first processor, the second processor and detecting unit are integrated into a controller.The integrated level of water wash system be can improve like this, installation and the assembling of water wash system facilitated.
In further technical scheme, also comprise the water inlet control valve that is connected in pump sump mouth; In the time that described first processor judges that described water circulation assembly shuts down, can also make described water inlet control valve close.Like this can be by the water inlet end sealing of water circulation assembly, to realize entering the control of air-flow direction in water circulation assembly, compressed air is discharged from the discharge outlet of water circulation assembly or other precalculated positions, and then can make the water of water circulation assembly discharge along projected route.
In further technical scheme, described water pipe comprises water inlet pipe, and described water inlet pipe is connected between water inlet control valve and the water sucking mouth of water pump; The other end of described pneumatic tube communicates with described water inlet pipe by check valve.Can make like this compressed air by water pump, the water in water circulation assembly be discharged, and then the water in water pump is forced to discharge, as much as possible the water being trapped in water circulation assembly be discharged.
In further technical scheme, also comprise outlet water control valve; Described water pipe comprises outfall sewer, and described outfall sewer is connected between the pump mouth of a river of outlet water control valve and water pump; The scheduled time after described first processor is opened gas path control valve, this first processor can also make outlet water control valve close, and makes water inlet control valve open simultaneously.Utilize this technical scheme, the emptying operation of air pressure can be divided into two stages: the first stage is that water inlet control valve is closed, and the water in water circulation assembly is discharged by outlet water control valve; Second stage is that outlet water control valve is closed, and water inlet control valve is opened, and remaining water in water circulation assembly is discharged by water inlet control valve.That the water being detained in water circulation assembly can be arranged like this is cleaner.
In further technical scheme, also comprise the temperature detection sensor that water temperature to water tank or environment temperature detect; Judge at the bottom of the water temperature of water tank or environment temperature in predetermined value according to temperature detection sensor detection signal during at described first processor, then judge according to the detection signal of checkout gear whether water circulation assembly shuts down.Like this, first processor just has two kinds of mode of operations, and a kind of mode of operation is forced drainage pattern; Under this pattern, the emptying assembly of air pressure can, in the time that water circulation assembly shuts down, start and forced drainage automatically.Another kind of pattern is general modfel, and under this pattern, in the time that water circulation assembly shuts down, the emptying assembly of air pressure starts no longer automatically, no longer carries out forced drainage.Pattern conversion is to determine according to the detection signal of temperature detection sensor; Lower in temperature, when the water in water circulation system may freeze, first processor is transformed into forced drainage pattern according to the detection signal of temperature detection sensor; Higher in temperature, when the water in water circulation system can not freeze, first processor is transformed into general modfel according to the detection signal of temperature detection sensor, no longer carries out air pressure draining.This just makes this water wash system have stronger adaptability, and can reduce the energy consumption of water wash system.
In further technical scheme, water wash system also comprises level detection sensor and the warning device for detection of described water circulation assembly precalculated position water level; Described first processor can be after gas path control valve be opened the scheduled time, and the water level that judges described water circulation assembly precalculated position according to the detection signal of level detection sensor is during higher than predetermined value, sends alarm signal to warning device; Described warning device can send predetermined warning according to alarm signal.Like this, at the emptying operation failure of air pressure or while having larger water not discharge, can send corresponding warning, to remind operating personnel, and then improve the reliability of water wash system.
Based on above-mentioned water wash system, the engineering machinery that comprises this water wash system providing also has corresponding technique effect.
Accompanying drawing explanation
Fig. 1 is the water wash system operation principle schematic diagram of the engineering machinery that provides of the embodiment of the present invention one;
Fig. 2 is the operation principle schematic diagram of the water wash system of the engineering machinery that provides of the embodiment of the present invention two.
The specific embodiment
Describe the present invention below in conjunction with accompanying drawing, the description of this part is only exemplary and explanatory, should not be considered as the restriction to public technology content of the present invention.
Please refer to Fig. 1, this figure and be the operation principle schematic diagram of the water wash system of the engineering machinery that the embodiment of the present invention one provides.
The water wash system that embodiment mono-provides comprises the empty assembly of the gentle pressure of water circulation assembly.Water circulation assembly comprises water pump controlling organization 10, water pump drive unit 11, water pump 12, outlet water control valve 13, water inlet control valve 14 and corresponding water pipe.Wherein, water pump controlling organization 10 is controlled water pump drive unit 11, and water pump drive unit 11 can drive water pump 12 to turn round, and water pump 12 can be absorbed water from water tank 15, and water is discharged from delivery port; Outlet water control valve 13 is connected between the pump mouth of a river and delivery port of water pump 12, and water inlet control valve 14 is connected between water pump 12 water sucking mouths and water tank 15.In this example, water pipe comprises water inlet pipe 17 and outfall sewer 18, and water inlet pipe 17 is connected between water inlet control valve 14 and the water sucking mouth of water pump 12, and outfall sewer 18 is connected between the pump mouth of a river and outlet water control valve 13 of water pump 12.As shown in the figure, water circulation system also comprises overflow valve 16 and check valve 17, overflow valve 16 is connected between the pump mouth of a river and water tank 15 of water pump 12, and check valve 17 is connected between the gap and water tank 15 of overflow valve 16, and the water overflowing by overflow valve 16 can be back to water tank 15 by check valve 17; Meanwhile, the water that check valve 17 can prevent water tank 15 is to stream.
In this example, water pump drive unit 11 is hydraulic motor, and hydraulic motor drives water pump 12 to turn round by applicable power transmission shaft; Corresponding with hydraulic motor, water pump controlling organization 10 is three hydraulic control valves; As shown in the figure, in the time that hydraulic control valve is positioned at left position, the hydraulic oil of hydraulic oil source can arrive hydraulic motor by this hydraulic control valve, makes hydraulic motor running.The position of hydraulic control valve 10, by two coil controls, is powered on and can be realized the conversion to hydraulic control valve position with power-off by suitable device control coil.Certainly, water pump drive unit 11 is not limited to hydraulic motor, can be also existing other power sources, as motor, engine etc.; Corresponding with power source, water pump controlling organization 10 also can adopt the mechanism matching with power source, to realize the control to power source, and then the operating condition of control water pump 12.
The emptying assembly of air pressure comprises pneumatic tube 20, and one end of pneumatic tube 20 communicates with compressed air or other sources of the gas with predetermined pressed gas can be provided by gas path control valve 21, and the other end communicates with the water inlet pipe 17 outside water pump 12 water sucking mouths by check valve 23; Check valve 23 fills perhaps compressed air and flow to water inlet pipe 17, but can stop aqueous reflux in water inlet pipe 17 in pneumatic tube 20.In this example, gas path control valve 21 is bi-bit bi-pass electrically-controlled valve, can change the position of gas path control valve by coil DT1, and then gas path control valve 21 is opened or closed.Coil DT1 forms the control end of gas path control valve 21.
In this example, water inlet control valve 14 is switch valve.Water wash system also comprises first processor 31 and detects the state detection sensor 33 of water inlet control valve 14 states, state detection sensor 33 is connected with an input of first processor 31, and the output of first processor 31 is connected with the control end of gas path control valve 21.State detection sensor 33 can detect the state of water inlet control valve 14, and in the time that water inlet control valve 14 stays open and closes, state detection sensor 33 transmits different detection signals to first processor 31; And then the difference of first processor 31 detection signal that can transmit according to state detection sensor 33 judges whether water circulation assembly is discharging water, judges whether water circulation assembly turns round, and sends predetermined command signal according to judged result.
In water-washing process, water inlet control valve 14 is opened, and gas path control valve 21 keeps closing, and outfall sewer 18 communicates with the delivery port of water circulation assembly by outlet water control valve 13, keeps isolation between source of the gas and pneumatic tube 20; Now, water pump 12 turns round, and can from water tank 15, absorb water, and water is flowed out from delivery port with the flow velocity of being scheduled to, and realizes the flushing to engineering machinery precalculated position.After water-washing process finishes, water pump 12 shuts down, and closes water inlet control valve 14.
In closing water inlet control valve 14, the detection signal that state detection sensor 33 transmits to first processor 31 changes.Transmit the variation of detection signal according to state detection sensor 33, first processor 31 can judge whether water circulation assembly shuts down; In the time that first processor 31 judges that water circulation assembly shuts down, first processor 31 transmits control signal to gas path control valve 21, changes the electric current of coil DT1, and gas path control valve 21 is opened; Now, between source of the gas and pneumatic tube 20, keep communicating, the compressed air that source of the gas provides arrives in the water inlet pipe 17 of water circulation system by gas path control valve 21, pneumatic tube 20 and check valve 23, and the water that is trapped in water inlet pipe 17, water pump 12 and outfall sewer 18 is discharged by outlet water control valve 13.Like this, shut down at water circulation assembly, when water-washing process finishes, first processor 31 can be opened gas path control valve 21 automatically, automatically makes compressed air pass through the emptying assembly of air pressure and arrives in water circulation assembly, and the water that water circulation assembly is detained is forced to discharge.And then, utilize this water wash system, after washing finishes, the emptying assembly of its air pressure can be discharged the water in water wash system in time in time.
According to actual conditions, the concrete connection arrangement of the particular type of gas path control valve 21, water pipe and pneumatic tube 20, can select suitable mode according to actual needs, is not limited to above-mentioned concrete mode.In this example, the other end of pneumatic tube 20 communicates with water inlet pipe 17 by check valve 23, and in the emptying operation of air pressure, water inlet control valve 14 is closed; Can make like this compressed air pass through water pump 12, and then the water being detained in water pump 12 is forced to discharge, as much as possible the water of water circulation assembly be drained only.Certainly, according to actual needs, also can make the other end of pneumatic tube 20 and other parts of water circulation assembly communicate, as directly communicated with the precalculated position of water pump 12 or communicate etc. with outfall sewer 18.Due to gas path control valve 21 being set, can keep the sealing of pneumatic tube 20 one end by gas path control valve 21, and then can avoid water to flowing in source of the gas, therefore, also check valve 23 can be saved.
In the emptying operating process of air pressure, the water in water circulation assembly is not limited to discharge by delivery port, also water can be discharged in water tank 15, to improve the cyclic utilization rate of water.In this example, outlet water control valve 13 is triple valve, and the water inlet a of this triple valve communicates with the pump mouth of a river of water pump 12, and a delivery port b communicates with the delivery port of water circulation system, and another delivery port c passes through mutually by check valve 17 and water tank 15; Like this, in the emptying operating process of air pressure, can according to actual needs, change the state of outlet water control valve 13, can make water inlet a communicate with delivery port b, now, the water of delay is discharged from delivery port, also can make water inlet a communicate with delivery port c; Now, as shown by arrows in FIG., can make water be back in water tank 15 by check valve 17.
In this example, water wash system also comprises the temperature detection sensor 34 that the water temperature of water tank 15 is detected, and this temperature detection sensor 34 is connected with an input of first processor 31, detection signal can be sent to first processor 31.Whether the water temperature that first processor 31 judges water tank 15 according to the detection signal of temperature detection sensor 34 is during lower than predetermined value; In the water temperature of water tank 15, lower than predetermined value, when water may freeze, first processor 31 judges according to the detection signal of state detection sensor 33 whether water circulation assembly shuts down again, then determines whether gas path control valve 21 to open according to aforesaid way; Water temperature at water tank 15 is not less than predetermined value, when water can not freeze, first processor 31 no longer judges according to the detection signal of state detection sensor 33 whether water circulation assembly shuts down, also just no longer determine whether gas path control valve 21 to open according to aforesaid way, and then no longer carry out the emptying operation of air pressure.
Like this, first processor 31 just has two kinds of mode of operations: a kind of mode of operation is forced drainage pattern, under this pattern, the emptying assembly of air pressure can, in the time that water circulation assembly shuts down, be started and forced drainage automatically.Another kind of pattern is general modfel, and under this pattern, in the time that water circulation assembly shuts down, the emptying assembly of air pressure is not restarted, and no longer carries out forced drainage.Pattern conversion is determined according to temperature detection sensor 34 detection signals; In water tank 15, the temperature of water is lower, and when the water that water circulation system is detained may freeze, first processor 31 is transformed into forced drainage pattern according to the detection signal of temperature detection sensor 34; In water tank 15, the temperature of water is higher, and when the water that water circulation system is detained can not freeze, first processor 31 is transformed into general modfel according to the detection signal of temperature detection sensor 34, no longer carries out air pressure draining.This just makes this water wash system have stronger adaptability, and reduces the energy consumption of water wash system.Certainly, temperature detection sensor 34 is not limited to detect the water temperature of water tank 15, also can testing environment temperature, and to carry out pattern conversion.Above-mentioned predetermined value can be selected according to actual needs, with in the time guaranteeing that occluded water can not freeze, selects general modfel can not cause the damage to water circulation system.
In addition, forced drainage switch also can be set, as shown in the figure, water wash system also comprises the forced drainage switch 32 being connected with first processor 31; Judge that at first processor 31 forced drainage switch 32 is in predetermined state (as open mode), and while judging that according to the detection signal of state detection sensor 33 water circulation assembly shuts down, gas path control valve 21 is opened, carried out in the above described manner the emptying operation of air pressure; Judge that at first processor 31 forced drainage switch 32 is in other states (as closed condition), even while judging that according to the detection signal of state detection sensor 33 water circulation assembly shuts down, do not make gas path control valve 21 open, no longer carry out the emptying operation of air pressure yet.Like this, also can make first processor 31 change between forced drainage pattern and general modfel by forced drainage switch 32, realize specific purpose.
As shown in the figure, in this example, water wash system also comprises level detection sensor 35 and the warning device 36 for detection of described water circulation assembly extreme lower position water level, and level detection sensor 35 is connected with an output with an input of first processor 31 respectively with warning device 36.Now, first processor 31 can be opened the rear time to gas path control valve 21 and carry out timing (timing can be started at according to first processor 31 in gas path control valve 21 transmitted signals, also can otherwise carry out), and whether the water level that can judge water circulation assembly extreme lower position according to the detection signal of level detection sensor 35 is higher than predetermined value.And then first processor 31 can send alarm signal to warning device 36 according to predetermined strategy; Described warning device 36 can send predetermined warning according to alarm signal.Described predetermined control strategy can comprise: the scheduled time after gas path control valve 21 is opened, and the water level of the extreme lower position of water circulation assembly is during higher than predetermined value, and first processor 31 sends alarm signal to warning device 36.The scheduled time can be determined according to water wash system concrete condition, to guarantee that the emptying operating process of air pressure completes; After the emptying behaviour's process of air pressure completes, if the water level of water circulation assembly extreme lower position still higher than predetermined value, illustrates that other parts of the emptying assembly of air pressure or water wash system break down, the water being detained is not discharged, or still have more occluded water; Now, first processor 31 makes warning device 36 send the alert signal of trick, can remind operating personnel to note, to improve the reliability of water wash system.
The particular location that level detection sensor 35 detects can be selected according to actual needs, can select position, water sucking mouth or other precalculated positions of water pump 12.Warning device 36 can be the warning warning that can send sound, light or other signals.
In order further to improve the automaticity of the emptying operation start of air pressure, the present invention also provides the water wash system of another kind of structure.
Please refer to Fig. 2, this figure is the operation principle schematic diagram of the water wash system of the engineering machinery that provides of the embodiment of the present invention two.
Compared with embodiment mono-, the difference of the water wash system that embodiment bis-provides comprises: water circulation assembly also comprises the second processor 19 of controlling water pump controlling organization 10; The output of the second processor 19 is connected with the control end of water pump controlling organization 10; Like this, the second processor 19 can send different control signals to water pump controlling organization 10, changes the state of water pump controlling organization 10, and then controls the operating condition of water pump 12 by water pump drive unit 11, changes the operating condition of water circulation assembly.In addition, the checkout gear that checkout gear detects the operating condition of water circulation assembly is a detecting unit 37, and detecting unit 37 is connected with first processor 31 with the second processor 19 respectively; Like this, detecting unit 37 just can transmit control signal by detecting the second processor 19, transmit different detection signals to first processor 31, and then first processor 31 difference that can transmit detection signal according to detecting unit 37 is determined the operating condition of water circulation assembly, again according to the mode identical with embodiment mono-, in the time judging that water circulation assembly shuts down, this first processor 31 is opened gas path control valve 21, carries out the emptying operation of air pressure.Like this, in the time that water-washing process is finished, just can automatically start the emptying assembly of air pressure, the water in water circulation assembly is discharged in time; No longer judge whether to start the emptying assembly of air pressure according to the state variation of water inlet control valve 14; That is to say: utilize this water wash system, after water-washing process finishes, do not need any operational motion of operating personnel, just can carry out the emptying operation of air pressure, improve the automaticity that the emptying assembly of water wash system air pressure starts.In this example, detect the second processor 19 control signals and judge the operating condition of water circulation assembly by detecting unit 37, can improve the reliability of the detection signal of checkout gear.
In this example, in order to improve the integrated level of water wash system, facilitate installation and the assembling of water wash system, first processor 31, the second processor 19 and detecting unit 37 can be integrated into a controller 200.
In the emptying operating process of air pressure, in order to control more accurately water drain flow path direction, in this example, water inlet control valve 14 is bi-bit bi-pass electrically operated valve, and the control end of this water inlet control valve 14 is connected with an output of first processor 31.Like this, in the time that first processor 31 judges that water circulation assembly shuts down, can also make water inlet control valve 14 close; And then can, by the water inlet end sealing of water circulation assembly, compressed air be discharged from the discharge outlet of water circulation assembly or other precalculated positions, and then can make the water of water circulation assembly discharge along projected route.Reduce compressed-air actuated outlet quantity, can also keep compressed air pressure constant in the situation that, what make that water extraction in water circulation assembly becomes be more thorough.
On embodiment bis-bases, outlet water control valve 13 can also be set to electrically-controlled valve, and the control end of this outlet water control valve 13 and an output of first processor 31 are connected.And make first processor 31 according to the state of predetermined policy control outlet water control valve 13, and its predetermined strategy can be: the scheduled time after gas path control valve 21 is opened, and outlet water control valve is closed, make water inlet control valve 15 open simultaneously.Utilize this technical scheme, can be divided into two stages in the emptying operating process of air pressure: the first stage is that water inlet control valve 14 is closed, the water in water circulation assembly is discharged by outlet water control valve 13; Second stage is that outlet water control valve 13 is closed, and water inlet control valve 14 is opened, and the water in water circulation assembly is discharged by water inlet control valve 14.That the water of water circulation assembly can be arranged like this is cleaner.
According to foregoing description, be appreciated that, the mode of determining water circulation assembly duty is not limited to aforesaid way, other checkout gears also can be set, determine the duty of water circulation assembly by detecting the corresponding running parameter of water circulation assembly, and then judge whether water circulation assembly shuts down, such as, checkout gear can be press detection sensor, determines the duty of water circulation assembly by the rotating speed, the pressure of water pipe or the pressure of hydraulic oil pipe that detect hydraulic motor operating condition, water pump.
On the basis that above-mentioned water wash system is provided, the present invention also provides a kind of engineering machinery that comprises this water wash system, this project machinery comprises engineering machinery body and water wash system, described water wash system is above-mentioned any one water wash system, and the pump mouth of a river of water pump 12 communicates with the precalculated position of engineering machinery body by water pipe.Engineering machinery can be concrete mixer, concrete conveyer etc.
Applied specific case herein technical scheme provided by the invention is set forth, the explanation of above embodiment is just for helping to understand technical scheme provided by the invention.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (9)
1. a water wash system for engineering machinery, comprises the empty assembly of the gentle pressure of water circulation assembly; Described water circulation assembly comprises water pump drive unit (11), water pump (12) and water pipe; Described water pump drive unit (11) drives described water pump (12) running, and described water pipe is connected with water pump (12); The emptying assembly of described air pressure comprises pneumatic tube (20), and one end of described pneumatic tube (20) communicates with source of the gas, and the other end communicates with water circulation assembly; It is characterized in that,
Also comprise first processor (31) and checkout gear (33,37); On described pneumatic tube (20), be connected with gas path control valve (21); Described checkout gear (33,37) is for detection of the operating condition of described water circulation assembly; In the time that described first processor (31) judges that according to the detection signal of checkout gear (33,37) water circulation assembly shuts down, this first processor (31) can make described gas path control valve (21) open;
Described water circulation assembly also comprises the water pump controlling organization (10) of controlling described water pump drive unit (11) and the second processor (19) of controlling this water pump controlling organization (10); Described checkout gear (33,37) is for detecting the detecting unit (37) of the second processor (19) control signal.
2. the water wash system of engineering machinery according to claim 1, is characterized in that, described first processor (31), the second processor (19) and detecting unit (37) are integrated into a controller (200).
3. the water wash system of engineering machinery according to claim 1, is characterized in that, also comprises the water inlet control valve (14) that is connected in water pump (12) water sucking mouth; In the time that described first processor (31) judges that described water circulation assembly shuts down, also make described water inlet control valve (14) close.
4. the water wash system of engineering machinery according to claim 3, is characterized in that, described water pipe comprises water inlet pipe (17), and described water inlet pipe (17) is connected between water inlet control valve (14) and the water sucking mouth of water pump (12); The other end of described pneumatic tube (20) communicates with described water inlet pipe (17).
5. the water wash system of engineering machinery according to claim 4, is characterized in that, also comprises the outlet water control valve (13) being connected with described water pump (12) the pump mouth of a river; Make the scheduled time after gas path control valve (21) is opened at described first processor (31), this first processor (31) can also make outlet water control valve (13) close, and makes described water inlet control valve (14) open simultaneously.
6. according to the water wash system of the engineering machinery described in claim 1-5 any one, it is characterized in that, also comprise the temperature detection sensor (34) that water temperature to water tank (15) or environment temperature detect; In the time that described first processor (31) judges the water temperature of water tank (15) or environment temperature lower than predetermined value according to the detection signal of temperature detection sensor (34), judge according to the detection signal of checkout gear (33,37) whether water circulation assembly shuts down again.
7. the water wash system of engineering machinery according to claim 6, is characterized in that, also comprises the forced drainage switch (32) being connected with described first processor (31); At described forced drainage switch (32), during in predetermined state, described first processor (31) judges according to the detection signal of checkout gear (33,37) whether water circulation assembly shuts down.
8. according to the water wash system of the engineering machinery described in claim 1-5 any one, it is characterized in that, also comprise level detection sensor (35) and warning device (36) for detection of the water level in the precalculated position of described water circulation assembly;
Described first processor (31) can send alarm signal to warning device (36) according to predetermined control strategy; Described warning device (36) can send predetermined warning according to alarm signal; Described predetermined control strategy comprises: the scheduled time after described gas path control valve (21) is opened, and the water level in described water circulation assembly precalculated position is during higher than predetermined value, and described first processor (31) sends alarm signal to warning device (36).
9. an engineering machinery, comprises engineering machinery body and water wash system, it is characterized in that, described water wash system is the water wash system described in claim 1-8 any one, and the pump mouth of a river of described water pump (12) communicates with the precalculated position of engineering machinery body by water pipe.
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| CN201110262386.XA CN102430533B (en) | 2011-09-06 | 2011-09-06 | Engineering machinery and water washing system thereof |
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| CN201110262386.XA CN102430533B (en) | 2011-09-06 | 2011-09-06 | Engineering machinery and water washing system thereof |
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| CN102430533A CN102430533A (en) | 2012-05-02 |
| CN102430533B true CN102430533B (en) | 2014-05-28 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103307312B (en) * | 2013-05-10 | 2015-12-23 | 三一汽车制造有限公司 | Floating valve, water wash system and engineering machinery |
| CN115283332A (en) * | 2022-07-21 | 2022-11-04 | 深圳市迪丫科技有限公司 | Anti-freezing automatic emptying system of high-pressure cleaning machine and emptying method thereof |
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| CN102430533A (en) | 2012-05-02 |
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